Chair



H. A. MWOOD.

CHAIR.

[APPLICATION FILED Nov.18. 1920.

H. A. ATWOOD.

CHAIR.

APPLICATloN FILED Nov.18, 1920.

Patented Oct. 3l, 1922.

2 SHEETSSHEE`I 2.

Patented @et 3l, i922.

maV

GHAR.

Application filed November 18, i926. Serial No. 424,877.

T 0 all whom t may concern.'

Be it known that I, HARRY A. ArWooD, a citizen of the United States, and resident of ll/lilwaulree, in the county of Milwaukee and State of lllisconsin, .have invented 4new and useful improvements in Chairs, of which the following is a description, reference being had to the accompanying'dravvings, which are a part of this specification.

This invention relates to certainnevv and useful improvements in chairs, and refers more particularly to featuresof novelty and advantages in swivel chairs with tiltable seats.

Heretofore, in chairs of this type, the chair irons, including the head and spider, have been cast, which, While performing the desired functionsin a satisfactory manner, are objectionable due to their great Weight. Hence, it is one of the objects of this invention to provide a chair iron construction whereby all the parts thereof may be struck or stamped from bendable metal to produce a structure which will be of the required strength and, at the same time, extremely light in Weight.

Another object of this invention is to provide a chair of the type described in Which a spider includes a central or main portion having down struclr spaced lugs or arms and having chair seat engaging arms rigidly secured thereto by the improved means hereinafter described.

i further object of this invention is to provide an improved springcushion including a lil-shape member upon the arms of which are mounted two opposed cap members having` cushion springs conned there,- between.

`A still further object of this invention resides in the means for securing the cushion springs in position. Beside the accomplishment of the above and other purposes, other salient features of the invention are sint plicity of construction, economy in manufacture, accessibility of adjusting parts, and .a structure of pleasing appearance.

lli-lith the above and otherobjects in vievv which will appear as the description preceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly dened by the appendedl claims, it being understood vention, parts of the chair iron beingbrolren away and in section to more clearly illustrate details of construction;

Figure 2 is a View part in section and part in elevation taken on the line 2-2 ofFigure l;

Figure 3 is a fragmentary top plan vievT of the chair iron, the outer portions ofthe chair seat engaging arms being broken away;

lligure 1lis a vieiv part in section and part in elevation talren on the line i-- of Figurel;

Figure 5 is a perspective vietv of the securingvmember for iirmly engaging all of the seat supporting arms theirinner ends to firmly secure the same in the spider; and

Figure t; is a perspective vieuT of the pair of seat engaging arms that are connected together by an intermediate portion.

Referring novv more particularly to the accompanying drawings, ittvill be perceived that the improved chair comprises an adjustably threaded vertical post or shaft l0, -which is engageable with a suitable supporting basa not shown, a spider or seat supporting` frame ll having outwardly ei:- tending arms l5, 16, 'i7 and i8 carried thereby in the novel manner to be hereinafter described, and secured at their outer ends to 'the under'face of a seat bottom 19, and a lower supporting member or head 2O secured on thetop of the post 1C, in the manner hereinafter described, and having a 'pivotal connection withthe spider or seat supporting frame 1l.

The head 20 has one end formed in the shape of 'an inverted cup, as at 2l, in which a second cup member 22 has a snug tit, the

end Walls of the cups 2l and 22 being' ceni outer ends of which are engaged trally bored to receive the upper reduced end 23 of the shaft 10. The end wall of cup 22 abuts the shoulder 24 formed at the inner end lof the reduced portion 23 of the shaft 10, and the extreme upper end of the shaft y1() projects slightly beyond the endy wall ot the cup 21 and is then riveted ory bored, as at 25, to firmly confine said cup end walls between the shoulder 24 and the head formed by the boring 25. This construction strengthens the head where the shaft is connected therewith and thus permits the Jformation ot said head by stamping.

The head 20 has its portion extending from the hub provided by the cups 21 and 22 i'orined on the upwardly projecting side ilanges for strength and the extreme outer end thereoi1 is projected upwardly, as

l.. 'to provide means for limiting the itertilting or' the chair seat and for rei fing one end oit the tension bolt of the cushion spring as' hereinafter provided. The Yianges 26'are provided, juxta-pose the huboithe head, with two alined upstanding projections or ears 23 `that are axially bored, as at 29, to receive` a hinge pintle 30, the in alined apertures in the lower'ends of a pair or depending spaced lugs 31 struck from the spider or chair seat supporting trarne 11.

The spider 11 is stamped from bendable material and is formed with two pairs of oppositely extending arms 32 and 33, the arms 33 being longer than the arms 32 and lhaving their outer ends struck downwardly from a point spaced from the center of the spider to torno the lugs 31. The arms of the spider are provided with upstanding flanges at the sides thereoic to reeniorce the same and to provice channels in the top face thereof in which the inner ends of the chair seat engaging arms are positioned. The chair seat engaging arms 16 and 13 are formed in one piece and connected at their inner ends by a strip 34 oit a width equal to the distance between the upstanding side flanges 35 ot each chair seat supporting arm. 14s depicted in Figures 1, 2,` and 3, the connected togetherl arms 16 and 18 are positioned in the channels of the alined extension 33 and the arms 15 and 17 positioned in the channels ot the alined extension 32 with their extreme inner ends abutting the adjacent sides of the connected together arms 16 and 18.

The connecting portion 34 of the arms 16 andA 18 is apertured, as at 36, to receive a rivet or other securing member 37 .which passes through a central aperture in the spider 11 and through a cross shaped locking or securing member 38 having diverging lugs 39 which engage the chair seat engaging arms adjacent their inner ends. The extreme outer ends of the lugs 39 are struck inwardly, as at 40, so that when the fastening member 37 is drawn tight, the portions 40 will be at all times under tension against the inner ends of the chair seat engaging arms. The chair seat engaging arms may be, ii desired, further secured in place by rivets 41, or the like, which pass through said arms and the projections 32 and 33 of the spider. The flanges oi the extensions 32 and 33 are provided with projections 42 near their outer ends, which are bent over as depicted in Figures 1, 2, and 3, after the chair seat engaging arms are vin place to riturther secure the same to the spider as will be readily apparent.

By reason of the hinge pintle 30 engaging the lugs 31, the spider 11 is in pivotal connection with the heade and said pivotal connection is limited in one direction by the upstanding part 27 of the head and is yieldably resisted in the opposite direction by the improved spring. cushion now about to be described. Also secured in place by the 'autening rivet 37 and the rivets 41 of the arms 16 and 13, is a plate member 43 which extends across the space between the lugs 31 and has its lower end provided lwith laterally extending parts 44 which engage against the roar sides of said lugs. Formed in the plate member 43 are two horizontally alined apertures 45, through which are passed the arms 46 cit a lil-shape clip, trie closed end47 oi? which engages against the plate member 43. The` arms 46, of' the ti-clip are retained inf-substantially central position with respect to the openings 25 by a lip 48 struclr from the plate member 43 and engaging the closed end 47 thereof, asdepicted in Figures 1 and 4, and mounted on the arms 46 are two opposed elongated cap members 49 and 50, the outer cap member 49 being secured in place by nuts 51 in threaded connectionwith the ends of the arms 46.

Coiled about each arm 26 and confined between the cap members l49 and 5G are two extensile springs 52, which at all times seek to urge said cap members apart, and passed. through centrally alined openings in said cap members a tension adjusting bolt 53 having a head on its inner end abutting the outer `'tace ct the cap member 50 and its outer threaded end passed through an opening 54 in the part 27 of the head and having an adjusting nut 55 mounted thereon. A washer 56, having a pointed inner face engaged in an indented part 57, is interposed between the nut 55 and the head portion 27,

as depicted in Figure 1. From this construction, it will be readily seen that upon the rearward tilting orn the seat 19, the ysprings 52 will be compressed, and that by A reason of this construction, an efficient and durable spring cushion is obtained. The cap 49 is recessed adjacent each nut 51yto prevent the accidental unscrewing thereof, and

incassa the 'tensionbolt 53 is securedat itspointof entry through the cap 50' so that rotation ofthe nut 55 will not rotate the bolt and hinder the adjustment `ofthe spring tension:

Vilhat l claim as my invention is:

l. In a device of the class described the combination of a spider of bendablewmetal having a plurality `of laterally extending channeled members all in the same horizontal plane, the ilanges of said channeled members being provided with overturned projections; a seat supporting arm secured Within the channel of each oi said members and engaged by said overturned projections; means comprising a stamped metal head for connecting said spider to said support; and means carried by said head adapted to be engaged by one of said arms to limit the movement oi' said seat in one direction.

2. In a device oi the class described, a spider having a plurality ot laterally extending channeled projections, seat engaging arms having their inner ends disposed Within the channels of said projections, a securing` plate having lugs extending into the channel of each projection to engage the .arm positioned therein, and means connecting the spider with a support.

8. ln a device of the class described, a spider having a plurality of laterally extending channeled projections, seat engaging arms having their inner ends disposed Within the channels of said projections,a securing plate having lugs extending into the channel of each projection to engage the inner ends of said arms and secure said arms in the channels, securing means positioned adjacent the outer ends of the projections for engagement with said arms, and means connecting the spider With a support.

4e. ln a device of the class described the combination of a spider stamped from a single piece of bendable metal having a pair oit spaced depending lugs and a plurality of radially extending channeled members all in the same horizontal plane; a seat supporting arm rigidly secured Within the channel of each of said members; a head member provided With an integral extension adapted to be engaged by one of said arms to limit the movement oi' said seat in one direction; means for pivotally connecting said dcpending lugs to said head member, and resilient connections between said spider and head member adapted to yieldingly resist movement of said spider about its pivot.

5. In a device of the class described the combination with a support of a spider member; a plurality of seat supporting arms rigid With said spider member; a head member oi stamped bendable material provided with a cupped portion adapted to engage said support; and a cup-shaped tit Within said cupped portion oi said head to i form a V.pivotal bearing therefor.

"dln a` device,V of the class described,

spider,' ak head, `a pivotal connection be-` tvveenthe spider and head, a transversely extending partcar-ried by the spider and provided Withtvvo spaced openings therein, an upstanding lpart. carried bythe head and having an opening positioned substantially centrally with respect to the openings in said transversely extending part, a U-shaped member having the ends thereof projected through the openings in said transversely extending part, opposed elongated cap members mounted on the` arms of said Us shaped member, an extensible spring coiled about each arm ont said U-shaped member and confined between the cap members, and a tension bolt connected with the innermost cap member and the head.

7. ln a device or" the class described, a spider, a head, a pivotal connection between the spider and head, a transversely extending part carried by the spider and provided With two spaced openings therein, an upstanding part carried by the head and having an opening positioned substantially cen trally With respect to the openings in said transversely extending part, a U-shaped member having the ends thereof projected through the vopenings in said transversely extending part, means retaining the arms of said Usliaped member substantially centrally of the openings.

S. ln a chair iron, a spider having two pairs oit oppositely extending channeled projections, a chair seat engaging arm Within the channel of eachprojection, and means engaging the inner ends of said arms to secure the same in position and `including a cross shaped member positioned at the center oi2 the spider and having securing means for clamping (the ends thereof against said arms.

9. In a chair iron, a spider having tivo pairs of oppositely extending channeled projections, a chair seat engaging arm Within the channel of each projection, means engag ing the inner ends of said arms to secure the same in position., and a lip on each projection and adapted to be struck over to engage the adjacent arm.

10. ln a device of the class described, a head; a spider pivotally secured to said head and having tWo positions of rest; a pair of coiled springs interposed betvveen said head and spider, normally urging the latter toward one of' its ositions of rest; a llshaped inembercarried by said spider, with its legs passing through said springs; and a `cap carried by the ends of the legs of said `U-shaped member, engaging one end ot said springs, for compressing the latter as said spider moves toward its vother position ot rest.

U-sheped member; caps carried by said bolt n and seid` U-shapedmember; and a pair of le coiled compression springs interposed between said caps, andsurrounding the legs of said U-shaped member, normally urging said spider toward one of its positions of rest, and resisting movement thereof toward i5 the other position of rest.

In testimony whereof, I afx my signature. HARRY A. TWOOD.4 

